Direct Page Register (Dpr) - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 2 CPU
2.3.6

Direct Page Register (DPR)

This section explains the direct page register (DPR) functions.
I Direct page register (DPR) [Initial value: 01
The direct page register (DPR) specifies, as shown in Figure 2.3-11 "Generating a physical
address in direct addressing mode", addresses 8 to 15 of an instruction operand in the direct
addressing mode. DPR has a length of 8 bits, and is initialized to 01
reading and writing by instructions.
Figure 2.3-11 "Generating a physical address in direct addressing mode" illustrates the
generation of a physical address in the direct addressing mode.
Figure 2.3-11 Generating a physical address in direct addressing mode
DTB register
24-bit physical address
36
]
H
MSB
DPR register Direct address in instruction
by a reset. It also allows
H
LSB